ADLINK Technology EVA SDK, User Manual, Page: 11 / 117

EVA SDK User's Manual
Image and Video Capture Plugins
7
3 Image and Video Capture Plugins
The following table lists the elements of the supported image and video capture plugins.
Element
Name
Plugin
Name
Vendor
Linxu/ARM
Version
Windows
Version
Description
pylonsrc Pylonsrc PlayGineering 3.5 3.5
A GStreamer element that uses
Basler's USB3 Vision cameras to
capture images
filesrc coreelements GStreamer 1.14.5 1.16.2 Reads from an arbitrary point in a file
rtspsrc rtsp GStreamer 1.14.5 1.16.2
Receives network data via RTSP
(RFC 2326)
v4l2src video4linux2 GStreamer 1.14.5 1.16.2
Reads frames from a Video4Linux2
device
multifilesrc multifile GStreamer 1.14.5 1.16.2
Reads buffers from sequentially
named files
ksvideosrc winks GStreamer - 1.16.2
Provides low-latency video capture
from WDM cameras on Windows
hikplugin hikplugin ADLINK 3.5 3.5
A GStreamer element that uses
Hikrobot's USB & GigE vision
cameras to capture images
flirplugin flirplugin ADLINK 3.5 3.5
A GStreamer element that uses
FLIR's USB & GigE vision cameras to
capture images
3.1 Element Descriptions
This section describes each element of the video capture plugin in greater detail.
3.1.1 pylonsrc
This is a GStreamer element that uses Basler's USB3 Vision cameras and Basler’s GigE Vision cameras for image
capture.
When multiple cameras are available, use the camera parameter to specify the specific camera for image capture.
To find out the IDs for each camera, launch the pipeline without specifying the
camera
parameter, and the plugin
will output the camera IDs.
The
width
and
height
parameters are used to set a custom resolution. To find out the maximum resolution of the
camera, refer to the camera's technical specifications, or launch the plugin with logging tuned to loglevel4
(GST_DEBUG=pylonsrc:4). Note that the camera saves the manually set resolution. Launching a pipeline with a
camera while specifying a resolution will result in the following runs using the same resolution unless the device is
reconnected or a different resolution is specified.
Resolution offsets can be specified to move the image. Possible offsets are calculated by
max(width|height)-
current(width|height)
. The parameters to specify offsets are
offsetx
and
offsety
. To center the image,
use
centerx
and
centery
. Note that setting the centering parameters will cause the plugin to ignore the offset
values.
The ADLINK EVA SDK uses the pylonsrc source code included in gst-plugins-vision.
https://github.com/joshdoe/gst-plugins-vision/tree/master/sys/pylon